Explanation: This is what it would look like to fly over
the surface of Jupiter's moon Ganymede. NASA's robot spacecraft Galileo
recently approached only 6000 miles from this frozen ice-ball
of a moon. The above image
is a digital reconstruction from two images taken during this
flyby. The blue color of the sky is artificial. Deep furrows
cover Ganymede's surface, and several
impact craters are also present. Galileo continues to orbit Jupiter
and send back breathtaking photos of Ganymede,
Io, Europa,
Callisto, and, of course, Jupiter
itself.